Hello, I am missing 250GB on my 1TB Fusion drive. I have completely formatted my drive in recovery but it still shows up as 750GB. This happened after something went wrong with my Bootcamp partition, I am not entirely sure what happened but it's gone. (And it used to be 250GB) I don't know what to do to get this space back. Please help me, thanks! --- Post Merged, Dec 7, 2017 at 2:07 AM --- I have followed the steps from Weaselboy's post, and I am still missing 250GB. I now have 1 drive called Fusion of 120GB and 1 drive called Untitled of 634,25GB UPDATE: I managed to make the Untitled drive into 999,86GB. Now I have 999,86GB on Untitled and 120GB on Fusion. How can I make these drives into 1 again? Preferably 1 of 1TB.